Zonos Status

This incident has been resolved.

**What products were affected and what was the impact?** Classify, Country of Origin Impact: DEGRADED PERFORMANCE   **What timeframe did this issue occur?** | **Date** | **Time** | | --- | --- | | Mar 11, 2026 | 2026-03-11 10:12 - 2026-03-11 12:06 |   **How was the issue detected?** Zonos observed elevated error rates affecting Classify and Country of Origin APIs. ‌ **What functionality was affected?** A portion of Classify and Country of Origin inference requests did not return a valid response. ‌ **What was the root cause?** A firmware issue on a subset of GPU nodes caused network connectivity failures. This caused the nodes to enter an unhealthy state. Our reconnect logic did not properly remove unhealthy nodes from the pool, so they continued to receive requests. ‌ **What was the resolution of the problem, and what steps are being taken to prevent future issues?** Shortly after discovering the issue, we restarted nodes to resolve the connectivity issues and restore service. We then identified the reconnect logic issue, and released a fix to prevent future issues. We have scheduled a firmware upgrade on all nodes to resolve the underlying network issue. We have also refined our alerting to catch errors more quickly in the future.

This incident has been resolved.

This incident has been resolved.

This incident has been resolved.

This incident has been resolved.

Users logging in may have experienced a flashing screen. The change was rolled back and the issue has been resolved.

This incident has been resolved.

**What products were affected and what was the impact?** * Checkout \(Custom Integrations\) Impact: * Major outage for affected merchants **What timeframe did this issue occur?** |   | **Date** | **Time** | | --- | --- | --- | | From: | Jan 24, 2025 | 12:00 PM MST | | To: | Jan 27, 2025 | 07:45 AM MST |   **How was the issue detected?** Our team was notified that Checkout domains were not being allowed as expected, leading to an immediate investigation by the engineering team. **What functionality was affected?** Online store settings \(allowed store domain\) were not loading properly for all stores using custom integrations. This prevented affected stores from loading checkout. ‌ **What problems did this cause?** Stores relying on custom integrations could not load their checkout correctly. ‌ **What was the resolution of the problem and steps that are being taken for continued follow-up?** * A rollback to a previous version immediately resolved the issue. * A new synthetic test has been implemented to ensure store settings caching is store-specific and does not mix settings between stores. ‌ ‌ **What mitigation solutions will we put in place to prevent this issue from occurring in the future?** * **Improved Testing:** A new synthetic test has been introduced to verify caching behavior and prevent incorrect store settings from being cached. * **Staging Environment:** Setting up a dedicated test environment for custom integrations to catch similar issues earlier.

### What products were affected and what was the impact? Shopify Checkout Partial outage: * Affected some Shopify merchants ### What timeframe did this issue occur? | | **Date** | **Time** | | --- | --- | --- | | From: | Jan 23, 2025 | 05:30 PM MDT | | To: | Jan 24, 2025 | 03:30 PM MDT | ### How was the issue detected? * A discrepancy was identified when some orders in Shopify were missing tracking numbers. * Additionally, merchants using older versions of the Shopify app experienced order import failures. ‌ ### What functionality was affected? * Order fulfillment ‌ ### What problems did this cause? * **Order Processing Issues:** Orders processed without tracking numbers caused confusion and delays for merchants and customers. * **Order Import Failures:** Some merchants experienced missing orders due to import failures. ‌ ### What was the resolution of the problem and steps that are being taken for continued follow-up? * We patched the root cause of the issue, resolving the tracking number and order import failures. * We updated all the affected orders with tracking numbers and manually imported orders that had failed to import. * API headers and logging enhancements were implemented to improve issue detection and response time. ### What mitigation solutions will we put in place to prevent this issue from occurring in the future? * Expand QA coverage to address downstream impacts of refactors, with a focus on comprehensive testing of critical flows, including label creation. * Expand synthetic test suite to validate end-to-end order processing, with particular emphasis on fulfillment workflows. * Establish a consistent testing environment that simulates real-world Shopify store configurations, reducing the risk of silent failures.